Carbon Offsets

The key questions

Where they part ways, and how each answer holds up. An answer stands or falls on what it explains and how it survives criticism, not on who holds it.

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Can offsets be made reliable enough to be worth using?

Mainstream: Yes, but only with strict standards, third-party ratings and transparency, and mainly for residual emissions.

Alternative: No. Additionality cannot be verified and the market rewards cheap, low-quality credits, so offsets should be abolished.

Still open. Independent after-the-fact audits of credits issued under the new rules would show whether the fixes work or the problem remains.

How each answer holds up

What it explains

Mainstream: It accounts for the documented over-crediting and for the shift of buyers toward rated and removal credits.

Alternative: It accounts for repeated failures across projects and for the way sellers are paid for volume rather than quality.

What would prove it wrong

Mainstream: If credits that pass the new standards still show over-crediting in independent after-the-fact checks, the answer fails. Mixed so far: the new standards are young and little tested.

Alternative: If rated, independently verified credits showed consistently accurate baselines, the claim would be wrong. Some newer evaluations find good methods can reduce over-crediting, though that is not settled.

Weak spot

Mainstream: The Core Carbon Principles label is too new to have a track record. Avoidance additionality is a counterfactual that no standard can directly observe, so tighter rules may only shift the problem.

Alternative: 'Cannot be verified' is stronger than the evidence. Methods such as synthetic controls and satellite checks do estimate counterfactuals, and the abolition view does not explain why those fixes would be inadequate for removals.
Should offsets be scaled up, kept limited, or abolished?

Mainstream: Keep offsets as a limited complement for hard-to-abate residual emissions, after cutting one's own emissions.

Alternative: The views split: abolish offsets, scale them with better integrity, or move to permanent removals only.

The mainstream answer holds up better, for now. The mainstream position covers integrity failures, financing needs and the evidence on direct cuts, while the abolish and scale-up positions each leave out one of these.

How each answer holds up

What it explains

Mainstream: It fits both the integrity failures and the evidence that emissions cuts are where progress is coming from.

Alternative: Each option addresses a different problem: license to pollute, a funding gap, or reversibility.

What would show it failing

Mainstream: It fails if companies use offsets in place of their own cuts. Tracking claims against actual cuts would show this, and the rules could be reversed easily.

Alternative: Abolition would fail if the finance lost for forest and methane projects is not replaced. Scaling would fail if integrity problems keep recurring. Both can be tested within a few years.

Weak spot

Mainstream: The line between residual and abatable emissions is vague, so firms can stretch it. Voluntary guidance has little enforcement.

Alternative: The abolition and scaling camps contradict each other, and neither explains how the other's main concern would be handled. Abolition has no replacement for the finance that goes to poorer countries.
Should avoidance credits be phased out in favour of permanent removals?

Mainstream: Prefer durable removals for residual emissions, but avoidance credits can still have a role in financing.

Alternative: Require polluters to buy growing amounts of durable removals and phase avoidance out of net-zero claims.

Still open. Whether durable removal costs and volumes fall enough to meet rising obligations would settle it.

How each answer holds up

What it explains

Mainstream: It accounts for reversal risk in forests while keeping funding flowing to forest protection.

Alternative: It matches the physics that carbon from fossil fuels stays in the air for a very long time, so storage must last as long.

What would show it failing

Mainstream: It fails if avoidance credits keep being claimed as equal to removals. This is visible in buyers' claims and ratings.

Alternative: It fails if removal costs and capacity do not scale, so that obligations are unaffordable or unmet. Current capacity is tiny compared with the need.

Weak spot

Mainstream: Durable removals are expensive and small in volume, so the preference does little in practice. No clear rule sets how much avoidance is acceptable.

Alternative: There is no deployed supply at the scale needed. The proposal also ignores the protection of existing forests, which no removal technology replaces.

Where they agree

Many historical avoided-deforestation and similar credits overstated their climate benefit because of inflated baselines or non-additional projects.
Cutting a company's own emissions comes first, and offsets should not be used to delay that.
Durable removals are more reliable than reversible avoidance credits.
Credit integrity and the effects on local communities need independent scrutiny.

Mainstream views

Offsets can help finance emissions cuts, but only if credits are high quality

Mainstream institutions treat offsets as a legitimate but limited tool. In principle, paying for a reduction or removal elsewhere can fund forest protection, renewable energy and methane capture that wouldn't otherwise happen. The MIT Climate Portal and similar explainers stress that the benefit depends on the credit being real. Several tests apply. The reduction must be additional, meaning it wouldn't have happened without the credit revenue. It must be measurable, permanent, and not just shifted to another location (leakage).

Evidence shows widespread integrity problems

Peer-reviewed and investigative work has repeatedly found that many credits overstate their climate benefit. Studies of avoided-deforestation projects found inflated baselines. Cookstove and renewable-energy credits have often been over-credited or non-additional. Regulators have faced similar criticism: wikipedia.org coverage notes Australian analysts argued that a large share of offsets under its national scheme did not reflect real reductions. This has hurt confidence and reduced demand for lower-quality credits. It has also pushed buyers toward removal-based and independently rated credits.

Offsets are a complement to decarbonization, not a substitute

The prevailing expert view, reflected in the IPCC, the Science Based Targets initiative and the Oxford Principles for Net Zero Aligned Carbon Offsetting, is that organizations should cut their own emissions first. Offsets should cover only residual emissions that are hard to abate. Long-lived removals, such as direct air capture and durable storage, are preferred over short-lived avoidance credits. Governance has been tightening through the Integrity Council for the Voluntary Carbon Market's Core Carbon Principles and through Article 6 of the Paris Agreement. Climate trends add context: phys.org reports that fossil CO2 emissions are projected to fall slightly in 2026. This is credited mainly to clean energy growth, which suggests that direct reductions are where progress is coming from.

Conclusion

The mainstream view is cautious and conditional. Carbon offsets can mobilize climate finance and may be needed for residual emissions, but many historical credits have been over-credited. They should not be used to justify delaying direct emissions cuts. Credibility now depends on stricter standards, transparency, third-party ratings and a shift toward durable removals.

Alternative views

Offsets are a license to keep polluting and should be abolished

This view holds that offsets let companies and wealthy consumers claim climate progress without cutting their own emissions. Critics point to investigations of rainforest credits, where many credits were found to represent little or no real avoided deforestation. They argue that baselines are inflated, that 'additionality' (would the project have happened anyway?) can't be verified, and that the market rewards selling cheap, low-quality credits. On this view, the only honest approach is direct decarbonization. Even well-run offsets delay structural change. Recent reporting that global fossil emissions may be starting to fall, driven by clean energy growth, is read by some as a reason to put money into real reductions rather than accounting substitutes (phys.org).

Attributed to: Survival International, Corporate Accountability, and Carbon Market Watch (campaign groups); the Guardian/Die Zeit/SourceMaterial investigation of Verra rainforest credits (2023); Oxford's Net Zero Principles authors, in part.

Offsets are colonial 'carbon colonialism' that harms local and Indigenous communities

This view focuses on justice rather than accounting. Large credit-generating projects can restrict land access, displace communities, or lock up territory for decades so that distant polluters can keep emitting. Proponents of this view argue that treating forests and land as tradable carbon commodities financializes nature. They say the benefits flow to intermediaries and developers, while the Global South bears the risks and loses control over its land.

Attributed to: Indigenous Environmental Network, Friends of the Earth International, Global Forest Coalition; Oakland Institute reports on Kenyan and Tanzanian carbon projects.

Offsets work and should be scaled, with better integrity rather than less use

Supporters of this heterodox-within-climate-politics position argue that the critics tar the whole market for the failures of some of it. Cutting emissions is cheaper in some places than in others, and without credit finance, forest protection and cookstove or methane projects in poorer countries would go unfunded. They propose stricter standards, such as the Integrity Council for the Voluntary Carbon Market's Core Carbon Principles, rating agencies, and satellite monitoring, instead of abandoning the tool. The MIT Climate Portal's overview discusses these trade-offs (mit.edu).

Attributed to: Integrity Council for the Voluntary Carbon Market, Mark Carney's Taskforce on Scaling Voluntary Carbon Markets, and Environmental Defense Fund (in part). I can't confirm individual positions beyond these organizations.

Replace avoidance offsets with permanent carbon removal and 'carbon takeback'

This view says the problem is the type of offset. Avoided-deforestation credits are reversible and uncertain, while the real need is to remove CO2 permanently. Advocates argue that polluters should be obliged to buy durable removals (direct air capture, mineralization, biochar) in growing proportions, rising to cover their residual emissions. Credits that pay for avoided emissions would be phased out of net-zero claims.

Attributed to: Oxford Offsetting Principles (Oxford Martin Programme on Net Zero); Myles Allen's 'carbon takeback obligation' proposal; Frontier and Microsoft-style buyer coalitions of durable-removal buyers.

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References

MIT Climate Portal, 'Carbon Offsets' explainer, https://climate.mit.edu/explainers/carbon-offsets
West, T.A.P. et al. (2023). 'Action needed to make carbon offsets from forest conservation work for climate change mitigation.' Science, 381(6660).
Allen, M. et al. (2020). The Oxford Principles for Net Zero Aligned Carbon Offsetting. University of Oxford.
Integrity Council for the Voluntary Carbon Market, Core Carbon Principles (2023).
Calel, R. et al. (2025). 'Do carbon offsets offset carbon?' American Economic Journal: Economic Policy.
Carbon offsets and credits - Wikipedia
Carbon Offsets - MIT Climate Portal

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